Performance of selected transgenic lines (L1 & L7) co-expressing AtDREB2A, AtHB7 and AtABF3 under mannitol-induced stress at seedling stage.

The seedlings were exposed to mannitol (200 mM) for seven days and photographed (a). The seedlings were then allowed to recover from stress for 15 days (b). The relative root growth after stress (c & d) and recovery (e & f) was recorded. The bar represents the mean ± SE (n = 8) (student’s t test; *P<0.05 versus wild-type).